Liquid heater



Jan. 16, 1951 OLDHAM 2,538 586 LIQUID HEATER Filed Jan. '7, 1949 MINVENTOR.

BY 0./% @227 ATTORNEY Patented Jan. 16, 19 51 LIQUIDTIEATER.

. .Freder-ick Edward oldham, Mellor,

near Blackburn, England,

Application January 7, 1949, Serial No. 69,784 In Great Britain January10, 1948 This invention concerns water and other liquid heaters.

An object of the present invention is to provide a device which isparticularly suitable; for

length of the element ensuring that no part or 6 Claims. (01. 219-39) Imain shell heating chamber.

said element is working at higher temperature The immersion heatingelements are preferably Preferably the cross-sectional area of theoutlet orifice is substantially equal to that of the of the electricalresistance type.

outlet pipe, and the cross-sectional area of the inlet orifice to-thatof the inlet pipe, said orifices being axial of the-shell. The inlet andoutlet pipes, which may be disposed centrally of their headers or at oneend thereof, are preferably in the region of the lower and upper part ofthe shell respectively.

The invention will be described further by way of example with referenceto the accompanying drawings, in which:

. Fig. l is a front elevation of a preferred form of boiler; and

Fig. 2 is a sectional side elevation on the line 'lI--|I in Fig. 1.

A main shell or heating chamber which is of cylindrical form, isprovided with headers I2, I3 and with supporting members I4 and I5.These parts may conveniently be of fabricated sheet metal constructionwith weldedjoints. An end plate I6 of the shell is bored with aconvenient number of holes, in which are welded bushes I'I. each havinga flange I8 seating in the outside of .end plate I6. Each bush I'Iprovides for the in.-

sertion of an immersion heating element into the The heating elements(not shown) are preferably provided with thermostatic control.

The main shell II has, at two diametrically opposite points on itsperiphery, axial inlet and outlet orifices formed by longitudinal slotsI9 and 20 respectively. The region of the periphery of shell II in whichslot I9 is formed is enclosed by the header I2 which is provided with aninlet pipe connection 2I at one end thereof constructed in a similarmanner as the immersion heater entrance orifices, and of cross-sectionalarea substantially equal to that of slot I9. The region of the peripheryof shell II in which slot 20 is formed is enclosed by the header I3,which is provided with an outlet pipe connection 22 centrally disposedthereof of cross-sectional area substantially equal to that of slot 20.Each of the headers has additional orifices therein whereby thermometersor thermostatic elements, for example, may be inserted. The header I2may have such an orifice 23, while the header I3 may have orifices 24and 25. Orifice 23 has 'a thermostatic element, whilst 24 and ,25accommodate a safety-valve connection and a thermometer respectively.

In operation cool water enters by the inlet 2|, through the header I2and slot I9 and into the shell II. The water, heated by the meansprovided becomes less dense and is thereby assisted in its elevation tothe upper part of shell I I and then through slot 20 and header I3and'into the and liquid heating means in said liquid heating chamber,one of said liquid orifices being in the form of a rectangular slit oflength substantially equal to the length of the liquid heating chamber,said rectangular slit being narrow in width as compared with the widthof the said liquid heating chamber.

2. A liquid heating device as set forth in claim 1 in which each orificeis in the form of a narrow rectangular slit of length substantiallyequal to the length of the liquid heating chamber.

3. A liquid heating device as set forth in claim 2 in which the crosssectional area of each orifice azsasmse i I. 1a

6. A liquid heating device as set forth in claim 5 in which one headeris at the bottom of the heating chamber and, the other header at the topof the heating chamber, the firs,t-;mentioned header having an inletpipe therein, ifinfl the 1 6 second mentioned header having an outletpipe therein.

FREDERICK EDWARD OLDHAM.

REFERENCES CITED The following references are of record in the file ofthis patent:

UN D ATEfi 16 Number Name Date ,1 ;640,04'7 Nesmith Aug. 23, 1927$549949 Nesmith Aug. 23, 1927 "1985546 Nosarzewski Dec. 25, 193412%212562 ffiynes June 3, 1947

